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/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
   Copyright (C) 2009-2015 Red Hat, Inc.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef H_SPICE_IMAGE_CACHE
#define H_SPICE_IMAGE_CACHE

#include <inttypes.h>

#include "common/pixman_utils.h"
#include "common/canvas_base.h"

#include "common/ring.h"

typedef struct ImageCacheItem {
    RingItem lru_link;
    uint64_t id;
#ifdef IMAGE_CACHE_AGE
    uint32_t age;
#endif
    struct ImageCacheItem *next;
    pixman_image_t *image;
} ImageCacheItem;

#define IMAGE_CACHE_HASH_SIZE 1024

typedef struct ImageCache {
    SpiceImageCache base;
    ImageCacheItem *hash_table[IMAGE_CACHE_HASH_SIZE];
    Ring lru;
#ifdef IMAGE_CACHE_AGE
    uint32_t age;
#else
    uint32_t num_items;
#endif
} ImageCache;

int image_cache_hit(ImageCache *cache, uint64_t id);
void image_cache_init(ImageCache *cache);
void image_cache_reset(ImageCache *cache);
void image_cache_aging(ImageCache *cache);

#endif